From 37eb9706ebf5b99d14c6086cdeef2c2f73f9c9fb Mon Sep 17 00:00:00 2001 From: Jie Liu Date: Tue, 26 Nov 2013 21:38:54 +0800 Subject: [PATCH] xfs: fix false assertion at xfs_qm_vop_create_dqattach After the previous fix, there still has another ASSERT failure if turning off any type of quota while fsstress is running at the same time. Backtrace in this case: [ 50.867897] XFS: Assertion failed: XFS_IS_GQUOTA_ON(mp), file: fs/xfs/xfs_qm.c, line: 2118 [ 50.867924] ------------[ cut here ]------------ ... [ 50.867957] Kernel BUG at ffffffffa0b55a32 [verbose debug info unavailable] [ 50.867999] invalid opcode: 0000 [#1] SMP [ 50.869407] Call Trace: [ 50.869446] [] xfs_qm_vop_create_dqattach+0x19a/0x2d0 [xfs] [ 50.869512] [] xfs_create+0x5c5/0x6a0 [xfs] [ 50.869564] [] xfs_vn_mknod+0xac/0x1d0 [xfs] [ 50.869615] [] xfs_vn_mkdir+0x16/0x20 [xfs] [ 50.869655] [] vfs_mkdir+0x95/0x130 [ 50.869689] [] SyS_mkdirat+0xaa/0xe0 [ 50.869723] [] SyS_mkdir+0x19/0x20 [ 50.869757] [] system_call_fastpath+0x1a/0x1f [ 50.869793] Code: 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 [ 50.870003] RIP [] assfail+0x22/0x30 [xfs] [ 50.870050] RSP [ 50.879251] ---[ end trace c93a2b342341c65b ]--- We're hitting the ASSERT(XFS_IS_*QUOTA_ON(mp)) in xfs_qm_vop_create_dqattach(), however the assertion itself is not right IMHO. While performing quota off, we firstly clear the XFS_*QUOTA_ACTIVE bit(s) from struct xfs_mount without taking any special locks, see xfs_qm_scall_quotaoff(). Hence there is no guarantee that the desired quota is still active. Signed-off-by: Jie Liu Reviewed-by: Christoph Hellwig Signed-off-by: Ben Myers --- fs/xfs/xfs_qm.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c index 14a4996cfec6..588e4909c589 100644 --- a/fs/xfs/xfs_qm.c +++ b/fs/xfs/xfs_qm.c @@ -2082,24 +2082,21 @@ xfs_qm_vop_create_dqattach( ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); ASSERT(XFS_IS_QUOTA_RUNNING(mp)); - if (udqp) { + if (udqp && XFS_IS_UQUOTA_ON(mp)) { ASSERT(ip->i_udquot == NULL); - ASSERT(XFS_IS_UQUOTA_ON(mp)); ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id)); ip->i_udquot = xfs_qm_dqhold(udqp); xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1); } - if (gdqp) { + if (gdqp && XFS_IS_GQUOTA_ON(mp)) { ASSERT(ip->i_gdquot == NULL); - ASSERT(XFS_IS_GQUOTA_ON(mp)); ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id)); ip->i_gdquot = xfs_qm_dqhold(gdqp); xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1); } - if (pdqp) { + if (pdqp && XFS_IS_PQUOTA_ON(mp)) { ASSERT(ip->i_pdquot == NULL); - ASSERT(XFS_IS_PQUOTA_ON(mp)); ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id)); ip->i_pdquot = xfs_qm_dqhold(pdqp); -- 2.30.2